P0702
Transmission Control System Electrical
Transmission
Generic OBD-II
High
What it means
P0702 means the transmission control system has detected an electrical fault somewhere in its circuits — wiring, a solenoid, a sensor, or the control module. In response the transmission often shifts harshly or drops into a limp mode that locks it in one gear to protect itself. It is an electrical/control fault rather than a sign the engine won't run, and companion codes usually help pinpoint the exact circuit.
High
Can I keep driving? The transmission may shift harshly, drop into limp mode, or lock in one gear — driveable slowly, but get it looked at before a long trip.
Common symptoms
What you'll notice
- Check-engine light on (sometimes a transmission warning light)
- Harsh, delayed, or erratic shifting
- Transmission stuck in one gear (limp mode)
- Other transmission electrical codes stored alongside this one
Common causes
Most likely first
- Damaged wiring or corroded connectors in the transmission control circuitLikely
- Faulty shift solenoid or its wiringCommon
- Failed transmission range sensorCommon
- Failed transmission control module (TCM)Less often
How to diagnose & fix
Work through it in order
- Scan and record all transmission codes and freeze-frame data to narrow down the affected circuit.
- Inspect the transmission harness and connectors — including the main case connector — for damage, corrosion, or loose pins.
- Check the TCM's power and ground feeds before condemning it.
- Test the solenoids and range sensor per the circuit indicated; repair wiring or replace the failed component, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0702?+
Short, slow trips may be fine, but limp mode and harsh shifts can strain the transmission. Have it diagnosed before extended driving.
Can I just clear P0702?+
It clears, but returns once the electrical fault recurs, and it can put the transmission back into limp mode. Repair the wiring or component first.
Related codes
Often seen with P0702
Read & clear P0702 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX